Well done morningstar. How brave and wonderful you are.
This happened to someone I know. Like you she found it very shocking. She had a visit from the ambulance crew who reassured her she had done all the right things and there was nothing else that could have been done.
It stayed with her for quite a while; she will never forget it. I am so proud of her.
She was told by ambulance, police etc that first aid trained or not, it is very unusual for a member of the public to try to save a complete stranger.
Re the CPR without protection, I wouldn't imagine being checked out at this early stage would be of any use, so you have plenty of time to seek advice from your GP.
I appreciate that CPR is more than "the kiss of life" but had you met this man in a pub on New Years Eve and snogged him drunkenly, would you have been worried about your health? Obviously if there was blood and /or vomit in the equation here my argument does not apply, but it was just a thought.
Well done and unmumsnetty (((((hug)))))